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  • "THE FZ TEAM" started this thread

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Sunday, January 11th 2009, 12:47pm

Clearblue Digital Conception Indicator Tests

The Moderation team here on FZ work constantly to make sure our members have good, clear consistent advice at all times. Of all the issues discussed here on the site, the subject of early testing is possibly the one we spend most time on. We have spent years watching women test early, get hopes up, have hopes dashed and cause themselves untold amount of worry, pain, tears and stress as they look for answers.

When Clearblue announced their new pregnancy test which showed how many weeks pregnant a woman is, our collective hearts sank as we anticipated how much more worry they would cause. Although they seem like a good ‘gimmick’ for those women who fall pregnant at the drop of a hat and who go on to have perfectly average pregnancies, they are tortuous for women who have gone through already life consuming treatment to get to the stage of two lines on a pregnancy test stick. Factor in confusion over egg collection dates, embryo transfer dates, artificially introduced hormones or uncertainties about the date you ovulated and symptoms of the medical procedures your bodies have been through then we have a very large margin for uncertainty. Unremarkably, since they have become available, those women who were given answers on test day now have the additional stress of analysing their pregnancies week by week, sometimes day by day.

As a team we discourage the use of these tests from an accuracy point of view and because if the weeks shown on the stick do not correlate with the figures you’re expecting then nobody here can give you the answers you want to hear. Only quantative blood tests, scans and patience can provide you with the reassurance you need.

Clearblue says this of the tests....


The Conception Indicator is 92% accurate at detecting when you conceived, when testing with the first urine of the day. The estimate is based on the level of hCG in your urine. The level of hCG varies from woman to woman, and it is therefore possible that the Conception Indicator might occasionally give misleading results


If you are testing more than 6 weeks after conception the Conception Indicator may give unexpected results. This is because the level of hCG in the urine is too high to be provide an accurate estimate of the time since conception.


The accuracy of the Clearblue Conception Indicator is 96.5% in the 1-2 week range, 76.1% in the 2-3 week range and 96.9% in the 3+ weeks range.

Please note that the accuracy at 2-3 weeks has a 24% chance of being incorrect. We know that this is the time you’re most likely to test and we want to draw your attention to this fact.

To summarise, we discourage the use of these tests. We feel they are a gimmick and that they produce more angst than reassurance.